Introduction
If your screen is cracked or not functioning correctly, follow this guide.
Tools
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            First, disassemble the device, taking off the top and bottom panels. See the disassembly guide for further directions. 
 
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            Slide the internal components out of the case. 
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            If the device has a lot of dirt on the internal components, this may be the cause of the screen malfunction. Reassemble device at this point to see if it has fixed the problem. 
 
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            Disconnect side clips of screen to detach the base of it from the main circuit board, using the metal spudger. 
 
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            To replace, purchase a new screen and locate the small silver bar located on the motherboard. 
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            Insert the end of the new screen into the opening of the silver bar, securing it in there to hold your new screen. 
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            After the device is assembled, power the device on. The issue should be repaired. 
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            If the device screen is still defective, an issue with the motherboard or a greater malfunction could be the cause. 
 
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To reassemble your device, follow these instructions in reverse order.